The desc_append() now flushes descriptors into RAM.
Signed-off-by: Marek Vasut marex@denx.de Cc: Stefano Babic sbabic@denx.de --- drivers/dma/apbh_dma.c | 23 ++++++++++++++++++++++- 1 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/drivers/dma/apbh_dma.c b/drivers/dma/apbh_dma.c index e85f5fe..c086629 100644 --- a/drivers/dma/apbh_dma.c +++ b/drivers/dma/apbh_dma.c @@ -93,6 +93,21 @@ static int mxs_dma_read_semaphore(int channel) return tmp; }
+#ifndef CONFIG_SYS_DCACHE_OFF +void mxs_dma_flush_desc(struct mxs_dma_desc *desc) +{ + uint32_t addr; + uint32_t size; + + addr = (uint32_t)desc; + size = roundup(sizeof(struct mxs_dma_desc), MXS_DMA_ALIGNMENT); + + flush_dcache_range(addr, addr + size); +} +#else +inline void mxs_dma_flush_desc(struct mxs_dma_desc *desc) {} +#endif + /* * Enable a DMA channel. * @@ -329,8 +344,10 @@ static int mxs_dma_release(int channel) struct mxs_dma_desc *mxs_dma_desc_alloc(void) { struct mxs_dma_desc *pdesc; + uint32_t size;
- pdesc = memalign(MXS_DMA_ALIGNMENT, sizeof(struct mxs_dma_desc)); + size = roundup(sizeof(struct mxs_dma_desc), MXS_DMA_ALIGNMENT); + pdesc = memalign(MXS_DMA_ALIGNMENT, size);
if (pdesc == NULL) return NULL; @@ -415,12 +432,16 @@ int mxs_dma_desc_append(int channel, struct mxs_dma_desc *pdesc)
last->cmd.next = mxs_dma_cmd_address(pdesc); last->cmd.data |= MXS_DMA_DESC_CHAIN; + + mxs_dma_flush_desc(last); } pdesc->flags |= MXS_DMA_DESC_READY; if (pdesc->flags & MXS_DMA_DESC_FIRST) pchan->pending_num++; list_add_tail(&pdesc->node, &pchan->active);
+ mxs_dma_flush_desc(pdesc); + return ret; }